<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <!-- 解压缩编码列表 -->
    <script>
      var decompressRLElist = function (nums) {
        let res = []
        for (let i = 0; i < nums.length; i += 2) {
          res = res.concat(new Array(nums[i]).fill(nums[i + 1]))
        }
        return res
      }
      console.log(decompressRLElist([1, 2, 3, 4]))
    </script>
  </body>
</html>
